6.1-stable review patch. If anyone has any objections, please let me know.
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From: Thinh Nguyen Thinh.Nguyen@synopsys.com
commit f2e0eee4703869dc5edb5302a919861566ca7797 upstream.
The DWC3_EP_RESOURCE_ALLOCATED flag ensures that the resource of an endpoint is only assigned once. Unless the endpoint is reset, don't clear this flag. Otherwise we may set endpoint resource again, which prevents the driver from initiate transfer after handling a STALL or endpoint halt to the control endpoint.
Cc: stable@vger.kernel.org Fixes: b311048c174d ("usb: dwc3: gadget: Rewrite endpoint allocation flow") Signed-off-by: Thinh Nguyen Thinh.Nguyen@synopsys.com Link: https://lore.kernel.org/r/00122b7cc5be06abef461776e7cc9f5ebc8bc1cb.171322978... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc3/ep0.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -224,7 +224,8 @@ void dwc3_ep0_stall_and_restart(struct d
/* reinitialize physical ep1 */ dep = dwc->eps[1]; - dep->flags = DWC3_EP_ENABLED; + dep->flags &= DWC3_EP_RESOURCE_ALLOCATED; + dep->flags |= DWC3_EP_ENABLED;
/* stall is always issued on EP0 */ dep = dwc->eps[0];